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<head>
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<body>
    <div class="container" style="background-color:white; border: 2px solid">
        <nav class="navbar" style="background-color:pink ; height: 60px; margin-left:-16px; margin-right: -16px;">
            <div class="input-group col-md-6" style="margin-top:6px ; margin-left:10px">
                <input type="text" class="form-control" placeholder="输入！！！！！">
                <span class="input-group-btn">
                    <button class="btn btn-default" type="button"><span class="glyphicon glyphicon-search" aria-hidden="true"></span></button>
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        </nav>
    <div class="col-md-4" style="border:20px solid white;background-color: pink">
        <h2>333</h2>
        <p> Lorem ipsum dolor sit amet, consectetur adupiscing elt Aenean phairetra vanus maximuseCras cond imentum
            portotor cnima egestas,Suspendhsse potenai</p>
        <p><a class="btn btn-default" role="button" href="#">！</a></p>
    </div>
    <div class="col-md-4" style="border:20px solid white;background-color: palegreen">
        <h2>444</h2>
        <p> Lorem ipsum dolor sit amet, consectetur adupiscing elt Aenean phairetra vanus maximuseCras cond imentum
            portotor cnima egestas,Suspendhsse potenai</p>
        <p><a class="btn btn-default" role="button" href="#">！</a></p>
    </div>
    <div class="col-md-4" style="border:20px solid white;background-color: yellow">
        <h2>555</h2>
        <p> Lorem ipsum dolor sit amet, consectetur adupiscing elt Aenean phairetra vanus maximuseCras cond imentum
            portotor cnima egestas,Suspendhsse potenai</p>
        <p><a class="btn btn-default" role="button" href="#">！</a></p>
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